21556557

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{401}}^1$

素因数の和:602

約数の個数: 32

約数和(自身を含む): 35118720

約数和(自身を除く): 13562163

約数列:

[1, 3, 9, 11, 27, 33, 99, 181, 297, 401, 543, 1203, 1629, 1991, 3609, 4411, 4887, 5973, 10827, 13233, 17919, 39699, 53757, 72581, 119097, 217743, 653229, 798391, 1959687, 2395173, 7185519, 21556557]

約数ペア:

[(1, 21556557), (3, 7185519), (9, 2395173), (11, 1959687), (27, 798391), (33, 653229), (99, 217743), (181, 119097), (297, 72581), (401, 53757), (543, 39699), (1203, 17919), (1629, 13233), (1991, 10827), (3609, 5973), (4411, 4887)]